RFR: 8311775: [TEST] duplicate verifyHeapDump in several tests [v5]

[Alex Menkov]

On Fri, 1 Sep 2023 02:00:04 GMT, Yi Yang <yyang at openjdk.org> wrote:

>> This is a follow-up patch of #13667. verifyHeapDump is duplicated in several tests, this patch tries to consolidate them into one method.
>
> Yi Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update HprofParser.java

Marked as reviewed by amenkov (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/15202#pullrequestreview-1607585428